//换算rem
(function(){
    function w() {
        var r = document.documentElement; //根元素html
        var a = r.getBoundingClientRect().width;
            if (a > 750 ){
                a = 750;
            }
            rem = a / 7.5;
            r.style.fontSize = rem + "px";
    }
    var t;
    w();
    window.addEventListener("resize", function() {
        clearTimeout(t);
        t = setTimeout(w, 300);
    }, false);
})();

  //通用弹框
function DoAlert(msg) {
 $("#AlertBlock").html(msg);
  $("#AlertBlock").fadeIn();
  $("body").css("opacity", 0.5);
  setTimeout(function() {
    $("#AlertBlock").fadeOut();
    $("body").css("opacity", 1);
  }, 2000);
}